Ha, that worked! many thanks! Outline instead of border, and then a gap of 1px. I suppose this is what border-collapse does in case of a <table>; there the entire table gets wider if you switch on the borders.
Strangely the right rim is now extra wide. I had that correctly before I tried to compact the code a little by using a function for returning the style properties that all cells shared.
Ha, that worked! many thanks! Outline instead of border, and then a gap of 1px. I suppose this is what border-collapse does in case of a <table>; there the entire table gets wider if you switch on the borders.
Strangely the right rim is now extra wide. I had that correctly before I tried to compact the code a little by using a function for returning the style properties that all cells shared.